Device for the production of metal band joints



A. PRAEMASSING 2,283,947 DEVICE FOR THE PRODUCTION OF METAL BAND JOINTS Original Filed March 18, 1936 4 Sheets-Sheet l I I I I I I I I l I I Z i 1 m.

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May 26, 1942. A. PRAEMASSING DEVICE FOR THE PRODUCTION OF METAL BAND JOINTS 1936 4 Sheets-Sheet 2 Original Filed "March 18 Inven for:

.May 326, 1942. A. PRAEMASSING DEVICE FOR THE PRODUCTION OF METAL BAND JOINTS 4 Sheets-Sheei 5 Original Filed March 18, 1936 Inventor:

y 1942- A. PRAEMASSING" 2,283,947

DEVICE FOR THE PRODUCTION OF METAL BAND JOINTS Original Filed March 18, 1936 -4 sheets sheet 4 Patented May 26, 1942 DEVICE FOR THE PRODUCTION OF METAL BAND JOINTS Adolf Praemassing, Cologne-Merheim, Germany Application March 18, 1936, Serial No. 69,574.

Renewed March 18, 1940. In Germany March 13 Claims.

Processes and devices for the production of metal band joints, which consist of sleeves subjected to alterations of shape which embrace the overlapping band ends and ensur the joint the overlapping ends 'of a band hoop with a sleeve placed as a band portion undeformed over the ends, the sleeve band is fed parallel to the plane of the bandandtransversely to the longitudinal direction of the band ends to be wrapped.

against tension, arealready known. These clos- It is obvious that this parallel guiding aping or locking means-were first used in the form plies only to that stage of the closing process in of previously prepared sleeves to be slipped over which the sleeve band bears against the band the band ends. However, special means, which ends to be wrapped. increased the costs of manufacturing such The devices for. carrying out the improved sleeves, were required for completely adapting .method can'be made in the most varied ways. such sleeves to the configuration of the overlap- They are preferably characterized by the fact ping metal band ends. It has therefore also been that the tool, which is arranged perpendicularly proposed to make the sleeves from a metal band to the metalband plane, is a shaping tongs for which is hereinafter called a sleeve band and is cutting oh the transversely fed metal band to specially fed for the said purpose. Parts of the sleeve length, said tongs being lowered for the sleeve band which project over the band ends cutting off operation. The sleeve simultaneously are brought under the influence of two jaws apbegins to be formed and the tongs are expanded proaching each other so that there takes place in for producing the shape when closing band ends corresponding recesses of the jaws a crimping of and sleeve. The lever, whichis close to the side. these parts at an angle of 180 whereupon the Where the sleeve bandis introduced, is designed crimped parts are closed relatively to the sleeve on the lower outer edgeas a cutting device. It in a direction parallel to the plane of the band is possible by moving the two tool levers in the ends. It was necessary to use sleeve bands of a direction toward the sleeve band to sever the special configuration and design because the length of the sleeve band, which is required for sleeve band was fed in a direction parallel to the forming the sleeve, in such a manner that those longitudinal direction of the superposed band parts of the sleeve band project over the band ends. It would thereby be necessary for the ends which would form at an angle of 180 the sleeve band to surround those parts above the free limbs of the sleeve bearing firmly against the band ends which constitute the free limbs of the band ends. By continuing the severing movesleeve after the alteration in shape. Moreover, ment, the free limbs of the sleeve band, which is the parts of the sleeve band, which correspond cut to the proper length, are disposed at an angle to the subsequent sleeves, are interconnected of 90 above the band ends. The rocking moveonly for a comparatively small extent of the ment of the tool levers, which is then to be initiwidth of the sleeve band so that the severance ated, renders it possible to dispose the limbs of of the individual parts in the closing direction the sleeve band over the band ends at a further will not be unnecessarily impededa angle of 90 so that the sleeve band assumes the The present invention has for its object to deshape of the sleeve. An anvil-like abutment velop the pr c ss and device for the producti n bears upon the central part of the sleeve band of such metal band joints in such a manner that and when the tools firmly bear against the parts a sleeve band of any configuration and design sleeve band which are disposed at an may be used and more particularly a sleeve band angle, the Sleeve thus formed is adapted to which fully corresponds, at least according to compass the band ends with sumcient pre1imi the configuratlm' with metal bands to be nary tension. During or after the formation of connected smce the wldthof the Sleeve band the sleeve those means are efiective which rois also thereby reduced to an extent which readd m R f h p ily permits the parts for forming the sleeves to we 6 a 0 ape folt-ensurmg the be severed from the remainder of the sleeve band connection tensmn' It is possible by in connection with the usual type of such closing suitably desgnmg the g parts of the 170015 devices, the necessity for a special design of the to wrap the band ends the sleeve band sleeve band is also dispensed with whereby the that sleeve band corresponds to t co figcosts of such closing or fastening devices can be "ration f the Overlapping band s whe e y *8- reduced to aminimum. Sleeve bearing fi y against the band ends is The said problem is solved according to the formed without it being necessary to produce invention in such a manner that when joining 5 special force effects for that purp s The annexed drawings show an embodiment of corresponding to Fig. 6;

the inventive idea by way of example as a cas fastening appliance. r

Fig. 1 is aside view of the appliance;

Fig.'2 represents a plan of the appliance with the actuating handle removed, together with the corresponding parts;

Fig. 3 represents a perpendicular cross-section on the line IIIIII of Fig. 1 in the initial position of all the parts;

Fig. 4 shows in the same position as Fig. 3, the allocated position of the work pieces;

Fig. 5 shows an intermediate position, whilst Fig. 6 is the lowest position of the slide and the tools; Fig. 7 shows the position of the work pieces Fig. 8 shows in the same view as Figs. 3 and 6, the terminal position which occurs in the making of the metal band fastener, whilst Fig. 9 again shows the allocated position of the work pieces corresponding to the representation of Figs. 4, 5 and '7;

Fig. 10 is a se on on the line X-X of Fig: 1;

Fig. 11 is a plan of the tool heads with wedge piece forced in;

Fig. 12 shows a somewhat altered embodiment of the slide;

Fig. 13 shows an arrangement "in which the .metal band serving for making the fastening pieces is taken from a separate roller;

Fig. 14 is a side view and Fig. 15 is a plan,- of the metal band fastener made by way of example;

Fig. 16 represents a vertical cross-section through the fastener on the line XVI-XVI of Fig. 15.

In all the figures, l indicates the body of the appliance which consists of two base plates l', I", which are held together by a cross piece l running substantially perpendicularly to the base plates. The base plate I" contains substantially the guiding devices for the two ends of the metal band which after being placed around-the material to be packed with a certain tension are joined together by a fastener to be made according to the invention. The two metal band ends to be joined together are designated l9 and 50 in Fig. 14. The guiding devices for the metal band end 49 have a recess 2 in the base plate I, the sole of which rises in the direction toward the tensioning device, to be hereinafter described, to the height which is, necessary for making the requisite alterations of shape of the sleeve band adapted for making the sleeve. However, the base plate I carries the tensioning device 3, which is made as a double ratchet drive. An eccentric 5 adjustable by means of a handle 4 permits shifting the friction wheels 6 in height, so that the friction wheels can be made to rest on the upper of the overlapping metal bands. upper surface holds fast under the pressure of the eccentric 5 the lower 48 of the overlapping metal bands. 50 (see Figs. 14 and 15) so that now by the actuation of the handle 8, the ratchet drive can be brought into operation un der the effect of which the necessary tensioning can be imparted to the metal band hooping. The handle 8 rotates on the axis of the two ratchet wheels 6 and engages thereon over the ratchet pawls 3.

In addition to the apparatus 3 the base plate I carries a device for wrapping a metal strip around the overlapping ends of the metal band. This device is hereafter described in detail and is provided with cutting means for severing the metal strip and wrapping the severed end around the overlapping ends of the metal band. The.

device further includes means for deforming the metal strip and the overlapping ends of the metal band to provide a tension-resisting, connection of the ends of the metal band. The device consists of a casing the three walls of which are arranged perpendicularly to the base plate I. The two opposite walls 9 and 10 of the easing as shown in Fig. 2 are secured together by a third wall l2 while the fourth side wall 13 which is secured to the walls 9 and ID by screws forms together with the other walls an opening extending perpendicularly to the base plate for guiding the slide member 14. The two ribs ll between which the tensioning device is arranged also extend perpendicularly to the base plate and merge into the wall 9. The slide I4 is H-shaped in cross-section as shown in Figs. 2 and 11. In the recess formed by the H-shaped design of the slide I4 tools l5 and I6 are rotatably supported at H and I8 and the tool 15 is designed for severing the metal strip which is to be wrapped around the overlapping ends of the metal band. The tools 15 and I6 consist of double-armed 1evers which oscillate about the hinge bolts I1 and I8 already mentioned. The lower arms are made in the form of a foot, so that a tool sole l5, l6, 9. tool point I5", IS", a foot back l5", l6 and'a tool heel l5", l6"", can be distinguished. The construction of the tool feet is here entirely the same with the single exception that the tool heel 'l is made as a cutting edge. Both tool feet show in the gorge between the backs l5, I6 the projections I9, 20 making the connection with the tool body l5, I6, while dies 2|, 22,are arranged in,the centre of the wedge, that is symmetrically with respect to the pivot axes ll, I8, The upper arms of the tool bodies l5, l6, terminate in powerful heads 23, 24 the construction of which is seen more fully from Fig. 2. The centre beam or bar 25' of the carriage I4 is at 26, 21 made as the matrix for the patrix. or cutting dies 2|, 22. The centre bar 25 of the carriage I4 receives the press plunger 29 in a central recess 28. The connec tion between press plunger 29 and the centre bar 25 is here made positive, the press plunger 29 being under the action of a powerful pressure spring 30. A cross bolt 32 passing through the oblong hole 3| of the press plunger prevents the press plunger from being able to leave its position. The surface 33 of the press plunger resting on the work is roughened, so that the work is held immovable. Recesses 34, 35 on the press An anvil 1 grooved on its plunger permit entry of the tool points l5", l6", so that these are not injured in consequence of unskilful treatment of the appliance. The

' flanks 36, 31 of the tools thereby come to rest on tric disk. Perpendicularly to the plane of thedisc, the disc 38 carries wedge pieces 43, 44 curved in arc shape, and made perfectly symmetrical with respect to a centre plane of the disc 38. The eccentricity of the disc 38 is, as shown in Fig. 1,

the centre point of rotation. On the contrary,

the limiting edge 38" runs in the range of the wedge pieces 44 completely concentrically to the central pivotal point. Under the influence of the part 38 of the eccentric disk, the carriage I4 is lowered and the piece of the sleeve band required for making the sleeve is cut off and the limbs projecting over the metal band ends 49,50 are bent downwardly assuming a U-shape. However, the carriage |4 remains stationary during engagement of the part 38" and the tools I5, I 6 rotate on the shafts l1, l8, so that the sleeve band is transformed to a sleeve and the sleeve undergoes those alterations of shape which en- 'sure the fastener.

The tools I and H; are prevented from oscillating or turning on the pivots I7 and I8 during such downward movement of the carriage M by means of projections 23 and 24 which engage the side walls l2 and |3of the casing. The means for preventing oscillation of the tools during the initial downward movement thereof also includes the springs 4| and 42 which biases the upper ends of the tools towards each other.

The springs 4|, flare not attached to the carriage l4 but to the tool body |5, |6 through the pins 45, 46 in such manner that the tensional direction is located externally of the joint bolts I1, I8. The springs 4| 42 thereby draw not only the carriage I4 towards the disc 38 but tend also to draw the tools towards each other and thus against the direction of movement which is effected bythe forcing in of the wedge pieces 43, 44 between the tool heads 23, 24. As shown by Fig. 8, the heads can be so drawn by projections 23', 24' towards the springs 4|, 42 that these are deflected out of the tensional direction and by their tendency to shorten tend to force the heads 23, 24 back into the casing. In this way the action of thespring tensional forces engaging through the pins 45, 46 is amplified in con-- sequence of the engagement on the longer lever arms I5, l6.

As shown in particular by Figs. 2 and 10, there is rotatably hinged on the casing wall ID a stop 41 which has first of all a projection 48 which serves for fixing themetal bands 49, 50 to be joined. in the overlapped position. In order to facilitate the introduction into the apparatus of the metal bands to be joined together, the walls 9 and ID of the casing have a lateral introducing tioned above. In order that the stop 41, 48 which is actuated through the head 52 does not auto-- matically leave its position, the slot 53 of the base plate is somewhat widened at 54 so that the narrow surface 55 of a stop 48 bears against the stop 56 formed thereby. A spring 51 here ensures the pressing of the part 41 in the direction of the casing wall I0. In addition to the stop 48, the 'device 4'! has a further stop 58 for the metal band to be introduced into the apparatus. mounted at 51 forms the stop 48 for the band ends 49 and 50 and this stop is connected to the stop 58 by means of an angular projection 59 as shown in Fig. l. The stop 58 limits the length 60 (see Fig. 4) of the metal band 62 introduced In other words the member rotatably tensioning is again wound on the the introduction of the metal bands 49, 50 which are in the overlapped position, the stop plate 41 is brought into the position shown in Fig. 10 in which the position, necessary formaking the fastening piece, of the metals bands 49, 50 to be joined together is clearly determined, then the stop 58 is also in a position in which it correctly adjusts the length 60 of the metal band 62 serving for making the fastening piece. The inlet slot 6| has, as shown in particular by Figs. 2 and 3, a cover plate 63 which extends towards thetools l5, IS in the form of a flexible tongue which rests on the metal band 62. By means I of adjusting screws 65, 66,the height of the inlet slot can be varied within fine limits. The backing part 61 limiting the inlet slot 6| at the bottom is carried in slide form and is made adjustable through the screw 68, so that its limiting surface 69 can be. so adjusted that it lies exactly perpendicularly under the cutting edge |5""'of the tool 5.

As shown in particular by Fig. 11, the inner limiting edges/flit,- ll of the tool heads 23, 24 have such a shape that the points of contact with the edges 12, 130i the wedge pieces 43, 44 always correspond. to a centre plane 14, through the tools. In this way, one-sided stresses-of the tools are entirely avoided.

The casing walls 9 and I0 guiding the carriage M are cut through at I6 and l! in T-form, as is shown in particular by Figure 10. The casing walls, 9 and I0 limiting the center limbs of the T-shaped recess 16 or T! bear firmly against the latera1,flat limiting surfaces of the eccentric disk 38 so that they effect an additional guiding of the'eccentric disk.

It may be advisable to provide roller bearings at the parts where the greatest friction takes place. The bearings can .for example be arranged in the head pieces 23. 24, the tool bodies l5, IS in the form of rollers 18 (see Fig. 11) which rest on the'active surfaces 12, 13 of the wedge pieces '43, 44. It is also possible to arrange on the slide M, a roller 19 (see ,Fig. 12) through which the cam disc 38 effects the drive of the slide.

The method of operation of the device described is as follows. After the metal band preferably taken from a supply roll has been placed around the package to be hooped in such manner that the initial piece of the metal band overlaps the metal band taken from the roll, the metal band after opening the stop plate 41 is placed by means of the inlet slot 5| in the position shown in Fig. 10 and the stop 41 is then brought into the position also shown by Fig. 10. in which the stop 48 clearly determines the position of the metal band 49, 50 to be joined, when in the overlapped position. A stop (see Figs. 1 and 10) here prevents too great'a swinging out of the member 41, leading to interruptions. The eccentric 5 is then lowered to such an extent that the friction wheels 6 rest firmly on the upper metal band 50. By the actuation of the handle 8, the upper metal band piece 58 can be so pressed against the lower metal band 49 that there is adjusted in the metal band hoop the desired tension. The length of metal band left free by the reel and the metal bandwhich is on the 'reel is severed from the hooping.

Metal band 62 is then introduced through the inlet. slot 6| until the end of the metal band 62 comes against the stop 56. This position is shown in Fig. 4. The metal band 62 can be similar to the metal band which is used for making the metal band hooping. Consequently, all the waste pieces produced in the making of the metal band hooping can be utilised, since the waste pieces have at least the length 60 necessary for making the fastening piece. To facilitate the carrying out of the fastening process, however, the metal band 62 can be unwound from a separate reel 8| as is shown in Fig. 13. The possibility is then given of using a comparatively soft material of great tenacity whereas in general hard and consequently more brittle materials are preferred for the metal band hooping.

Thehandle 40 is now rotated clockwise from the position shown in Fig. l. The limiting edge 38 of the cam or eccentric disc 38, the distance of which from the axis of the pivot bolt 39 con-: tinuously increases, thereby drives the slide I4 and with it through the hinge bolts l1, l8 the tools l5 and I6 downwards towards the metal band joint 49, 50, 62, and the counter action of the springs 4|, 42 is overcome. downward movement of I the slide member or carriage M the tools 5 and I6 are prevented from oscillating on the bolts or pivots I1 and I8 by means of the projections 23 and 24 which slide along the inner walls I2 and I3 of the casing. Directly afterwards, the cutting edge |5"" which is preferably made of sickle shape, comes on to the-metal band 62, so that the band on the continuation of the movement is sheared. The backing 69 here forms with its limiting surface 68, the counter cutting edge. The length 60 of the part out 05 provides the length of the fastening piece, which is, twice the width of the metal band plus four times the thickness of the metal band. On the continuation of the movement, the soles |5, |6' of the tools l5 and I6 rest on the free lugs 62' 62" of the piece of metal band cut off. But before this first alteration of shape of the piece of metal band out off is carried out, the notched ,end surface 33 of the press rod 29 is engaged with the metal band joint. This metal band joint acts, owing to it being on the one hand enclosed between the limiting edge 82 (see Fig. and the stop 48, and on the other hand being supported over its entire surface up to the width of the metal band 62 by the base plate |'-'-see the polygonal limiting surfaces 8366 of the well-like recess 81 of the base plate-as a fixed backing or anvil, so that no alterations of shape can take place except those of the free lugs 62', 62". Fig. 5 shows the apparatus in the position thus described. If the rotary movement of the disc 38 is continued, the

slide |4 reaches its lowest position at the moment when the handle 40 has been rotated by 90 from the initial position shown in Fig. 1. At the same time, the free lugs 62', 62" have been dle 40 is still further rotated, the limiting edge.

38" comes into contact with the plunger |4. Since the limiting edge 38" is located concentrically to the axis of the pivot bolt 39, the position of the slide i4 remains unaltered. In this During such position the spring 30 of the press plunger 29 is compressed in such a manner that the force exerted by the plunger 29 is greater than the forces which tend to bend outwardly the centre limb of the piece 62 of the metal band bent into U-shape.

However, the wedge pieces '43, 44 with their limiting edges 12, 13 have meanwhile entered between the head pieces 23, 24 of the tools |5, |6, as is clearly to be seen from Fig. 6. By means of the penetrating wedge pieces, the heads 23, '24 are forced apart, oscillating the tool bodies I5, l6 about the hinge bolts l1, l8, so that they penetrate into recesses 88, 89 of the casing walls |2, |3. Owing to the oscillation of the tools |5, |6 the points I5, |6"-of the tool feet, which in the meantime towards the conclusion of the movement of the slide towards the metal band have come to rest on the lugs 62, 62", approach each other, so that the lugs under the influence of this approach are moved inwards. Since the points of the feet of the tool up to the time when the tools |5, |6 are rocked, have a distance apart corresponding to the width of the metal band plus twice the thickness of the metal hand, there takes place a sharp bending of the free lugs 62, 62" round the limiting edges of the metal bands 49, 50 when in the overlapped position. Owing to the fact that the points l5", l6 of the feet of the tools move during the oscillation movement of the tools relatively toward the free lug ends 62', 62" these lugs bear against the points of the tools with a preliminary tension due to the elasticity of the material. The inward movement of the free lugs takes place during the exertion of forces thereon which are positioned away from the bending points and the two edges of the metal bands, 56, so that during the inward movement of the free lugs, the formation of the metal band piece 62 on the metal bands 49, 50 is accomplished.

Fig. 8 shows the terminal position of this movement in which the backs |5"', |6"' of the feet of the tools |5, |6 have reached a horizontal position. Thus the metal band joint 49, 50, 62 is at the last subjected to a powerful closing pressure directed perpendicularly to the plane of the metal band, which produces the connection due to friction between the metal band piece 62 now forming the fastening piece, and the metal bands 49, 50, connected together. In order that a tension-resisting connection may be obtained cutting dies 2| and 22 are provided between the parts l9 and 20 and thetool back |5"' and |6"' which dies press out the marginal parts 90 and 9| of the metal band joint from the metal band planes and cut them perpendicular to the metal band planes while recesses 26 and 21 provided in the slide |4 act as matrices to receive the bulged portions of the metal band joint. In this way a shaped metal joint fully withstanding tension and pressure is made, as is shown in Figs. 14-16. After the production of this metal connection, the stop piece 41 is shifted into the position exposing the inlet slot 5|, the stop 48 being brought by tension'on the head 52, against the action of the spring 51, out of the range of the stop surface 55. The baseplate I between the packed material and the metal band hooping can then be drawn out. The lever 40 is then brought back into the initial position shown in Fig. 1. The tension springs and if necessary the deflected springs are shortened so that the slide H as well as the tools |5. |6 are themselves or in the slide, any desired connec-' tion or joint based on friction or shape, can be attained.

I claim:

1. In a device for making metal band jointsby wrapping a metal strip around the overlap ping ends of a metal band, a casing having a slide member reciprocable therein, means for cutting a metal strip arranged transversely of the overlapping ends of said band to serve as a sleeve band, said means comprising a tool lever having one end arranged adjacent the band ends, said end of the tool lever having a cutting edge extending parallel with respect to the band ends and transverse with respect to the sleeve band, another tool lever, 'said levers being pivotally mounted on said slide member to oscillate in a plane perpendicular to the plane of the band ends, means for oscillating said levers, and

means for moving the slide member in a direction perpendicular to the plane of the band ends.

2. Apparatus according to claim 1 inwhich the ends of the levers adjacent the band ends are provided with extensions having pointed ends projecting in opposite directions, and the means for oscillating the levers engaging the opposite ends of the levers for moving the pointed ends towards each other.

3. Apparatus according to claim '1 in which a cutting die is provided on each lever adjacent the lower ends thereof.

4. Apparatus according to claim 1 in which the lower ends of the tool levers are provided with extensions, and means for preventing rotation -of the levers on their pivots during initial movement of the slide member. v

5. Apparatus as claimed. in claim 1 in which the two levers are provided with inwardly projecting extensions on the lower ends thereof, the

upper surfaces of said extensionsbeing inclined with respect to the plane of the bandend in the inoperative position of the levers.

6. In a device for binding the overlapping ends of a metal band, means for guiding said metal band, means for guiding a metal strip transversely to the first mentioned means, cutting means for severing an end portion of the metal strip, a stop member positioned to be engaged by the free end of said metal strip and spaced a distance from said cutting means which is equal to twice the width of the metal band plus four times the thickness thereof, means for holding said severed strip adjacent one face of the overlapping ends of the metal band, means for bending the end portions of the severed metal strip to lie along the other face of the overlapping ends of the band, and means for deforming said severed metal strip and the overlapping ends of said band to prevent longitudinal movement of one band end with respect to the other.

7. In a device for binding the overlapping ends of a metal band, means for guiding said band, means for guiding a metal strip transversely to said means, a frame including a casing, a

slide member movable within the casing, tool levers pivotally mounted on said slide member, a cutting edge carried by one of said tool levers for severing said metal strip, a plunger arranged between said tool levers, a. spring urging said plunger towards said metal strip, a pin and slot connection between said plunger and said; slide member, a cam engaging the slide member for moving said slide member in the casing to move the tool levers into engagement with and bend ends of the metal strip, an ,extension carried by each tool lever, additionallcam means movable between the tool levers for engaging and pivoting the tool levers after operation of the first cam so that the extensions of the tool levers, are moved towards each other to further bend the ends of the metal strip around the overlapping band and provide bearing, means below the plunger. u

8. In a device for bending the overlapping-ends ofa metal band, means for guiding said band,

means for guiding a metal strip transversely to said means, a frame including a casing, a slide member movable withinthe casing, tool levers pivotally mounted on said slide member, a cutting edge carried by one of said tool levers for severing said metal strip, a cam engaging the slide member for moving said slide member to move the tool levers into engagement with the metal strip and bend ends thereof over the band ends, projectionscarried by the tool levers engaging the casing preventing oscillation of said tool levers during said movement of the slide member, an inwardly projecting extension carried by each tool lever, another cam movable between the tool levers for engaging and pivoting the tool levers after operation of the first cam so-as to move the extensions of thetool levers towards each other and further bend the ends of the metal strip around the overlapping band, and means for deforming the metal strip and the overlapping ends of said metal band.

9. In a device for bending the overlapping ends of a metal band, means for guiding said band, means for guiding a metal strip transversely to said means, a .frame including a casing, a slide member movable within the casing, too levers pivotally mounted on said slide member, a cutting edge carried by one of said tool levers for severing said metal strip, outwardly extending projections carried by each tool lever engaging the casing, a cam engaging the slide member for moving said slide member and the tool levers into engagement with. the metal strip so as to bend end portions thereof, said casing having recessestherein for receiving said projections after said movement of the slide member, an extension carried by each tool lever, and another cam movable between the tool levers for engaging and pivoting the tool levers after operation of the first cam so as to move the extensions of the. tool levers into engagement with the bent ends of the metal strip and further bend the same around the overlapping band.

10. In a device for bendingthe overlapping ends of a, metal band, means for guiding said band, means for guiding a metal strip transversely to said means, a frame including a casing, a slide member movable within the casing,

' tool levers pivotally mounted on said slide member, a. cutting edge carried by one of said tool I levers for severing said metal strip, outwardly extending projectionscarried by each tool lever engaging the casing, a cam engaging the slide;

member for moving said slide member and the/ tool levers into engagement with the metal strip I so as to bend end portions thereof, said casing having recesses therein for receiving said projections after said movement oi the slide member, an extension carried by each tool lever, an-

other cam movable between the tool levers for engaging and pivoting the tool levers after operation of the first cam so as to move the extensions of the tool levers into engagement with thebent ends of the metal strip and further bend the same around the overlapping band, and springs biasing said tool levers to an inoperative position.

11. In a ,device for binding the overlapping ends of a metal band, means .for guiding the metal band, means for guiding a metal strip transversely to the first mentioned means and along one face of the overlapping ends of the metal band, cutting means for severing an end end portions of the severed metal strip to lie along edges of the overlapping ends of the metal band, means for further bending the end portions of the metal strip to lie along the other face of the overlapping ends of the band, and means'for deforming said bent metal strip and the overlapping ends of said bandto prevent longitudinal movement of one band end with respect to the other.

12. In a device for binding the overlapping ends of a metal band, means for guiding said band, means for guiding a metal strip transversely to said means, a casing, a slide member movable within the casing, tool levers pivotally mounted on said slide member, a cutting edge carried by one of said tool levers for severing said metal strip, a cam engaging the slide member for moving said slide member in the casing to move the tool levers into engagement with and bend ends of the metal strip, projections carried by said tool levers engaging the casing preventing oscillation of the tool levers during said movement of the slide member, an extension carried by each tool lever, another cam movable between the tool levers for engaging and pivoting the tool levers after operation of the first cam so as to move the extensions towards each other to further bend the ends of the bent portion of the metal strip, means'for bendingmetal strip around the overlapping band, an arm rotatably mounted on the casing, and a stop member carried by said am spaced from the cutting edge of said tool lever.

13. In a device for binding the overlapping ends of a metal band, means for guiding a metal strip transversely to said means, a casing, a slide member movable within the casing. tool levers pivotally mounted on said slide member, cutting means carried by one of said tool levers for severing said metal strip, a rotatable cam engaging the slide member between the tool levers for moving said slide member in the casing and moving the tool levers into engagement with the metal strip to bend ends thereof, an extension carried by each tool lever, projections carried by the tool levers engaging the casing 'preventing oscillation of the tool levers on the pivots during rotation of said cam, lateral cam means carried by the first cam for engaging and pivoting the tool levers after operation of the first cam to swing the tool levers and the extensions thereof into engagement with the bent ends of the metal strip to further bend the ends around the overlapping band, and yieldable means for biasing the tool levers against the lateral cam means.

ADOLF' PRAEMASSING. 

